Marxism is the key to understanding the society we live in today
Marxism is first and foremost a mode of analysis of capitalist society; its aim is to tell us why society is how it is. In my view Marxism is broadly correct and is worth studying in depth; but that is something that each person must do for him or herself.
The crisis which erupted in the late 2000s is not just economic; it is systemic, and it sledge-hammered the claims and assumption of the neo-liberalism which gripped the ruling elites from Thatcher to Blair. As insecurity pain and poverty mushroom, it is understandable that people, particularly the young who are the worst affected, need to analyse the society in which they live.
Understanding the cage you are in does not give you the key to the door. Marx died in 1883 and his sketch-map solutions can only be a starting point for thinking about the way forward.